k180v3. rolling code 4-channel uhf remote control - Ozitronics

k180v3. rolling code 4-channel uhf remote control -

K180V3. ROLLING CODE 4-CHANNEL UHF REMOTECONTROL with RESET ON EACH CHANNELThis kit is a significant improvement on a kit which was published in the Australian electronicsmagazine Silicon Chip in 7/2002. Please read this article as background. You can get it fromhttp://www.crowcroft.net/kitsrus/k180.zipThe main addition is that we have added Reset to each channel when in TOGgle mode. Thus forexample, a garage door motor could be started when the TOGgle relay is activated then it willautomatically cut off when the door has travelled its full movement and it hits a switch which resets/ turns off the corresponding relay. The user does not have to stand watching the door then press thebutton on the transmitter unit again when he thinks it has open ‘enough’. We have also replaced theindividual transistors of the original circuit by a ULN2003A IC.Up to 15 Transmitter units can be learnt by one Rx unit. (The article says 16 but the technicalmanual says 15.) To electronically connect the Tx unit with the receiver board press button 1 (thebutton all by itself) while simultaneously pressing the LEARN tact switch on the main board. Youonly have to do this briefly for under a second. But note it takes about 15 seconds for the two unitsto internally connect and recognize each other. (During this 15 seconds it seems that one and onlyone keypress of the Tx unit will be recognised. Just disregard this. Wait the full 15 seconds until thetwo units have connected. Do not press the LEARN button again. Just wait 15 seconds.)Tx units attached to any Rx unit can be electronically unattached by pressing the LEARN buttoncontinuously for 8 seconds. The VALID DATA LED is on during these 8 seconds. As soon as theLED goes off then you know that all Tx units previously recognized by the Rx unit have now beenunattached from the Rx unit. If you want more details about the Microchip technology behind theseTx & Rx’s then gethttp://www.kitsrus.com/pdf/an662.pdf and http://www.kitsrus.com/pdf/an665.pdfTechnical details about the Automicro devices can be got from http://www.kitsrus.com/pdf/automicro.pdfWe sell Tx units and Rx units separately as A16TX and A16RX.Assembly. See Components listing below. Follow the overlay. Be careful on R3 & R5, do not putone leg in the via.Email me at peterhk@kitsrus.com if you have any problems.COMPONENTSResistors 5% 1/4W carbon:1K R13 brown black red 12K2 R9 R10 R11 R12 red red red 41M R2 R4 R6 R8 brown black green 410M R1 R3 R5 R7 brown black blue 41N4004 D1 1100nF C1 2 3 4 5 6 7 8 10 11 10100uF/16V ecap C9 14013 IC1 IC2 2ULN2003A IC3 17805 IC4 114 pin IC socket 216 pin IC socket 13 pin SIL header LK1 LK2 LK3 LK4 4Jumpers 4LED 3MM green L5 1LED 5MM red L1 L2 L3 L4 412 volt relay RL1 RL2 RL3 RL4 4Zippy tact switch PB1 12 pole t/block ED 13 pole t/block ED 23 pole t/block EK 417cm aerial wire 14 button Tx unit 4312RSA(O1) 1Receiver module 3302D4-15(2A1) 1K180V3 PCB 1